rara rarb rare rars rasa rasc rase rass rasu raua raub rauc raue raun raus rbbb rbbr rbbs rbss rcac rcas rcbc rccb rccc rccs rcnr rcsa rcsc rcss rea- reac reae rean rear reas reau reba rebb rebe rebs rebu reca recc rece recr recs recu reeb reen rees rena rene renn rens renu rera rere rers reru resa rese resn ress reue reus reuu rnas rnbr rncs rras rrna rrrr rrun rsaa rscc rscn rscs rsee rsna rsnn rsnr rsre rssa rsua ruan ruas ruba rubb rube rubs rubu ruca ruce ruen ruer rues runa runc rune runn runs rura rurc rure rurs ruru rusa ruse russ rusu ruun sa-c saab saac saae saan saar saas saba sabb sabc sabe sabr sabs sabu saca sacc sace sacn sacr sacs sacu saeb saen saer saes sana sane sann sanr sans sanu sara sarc sare sarn sarr sars saru sasa sasc sase sass saua sauc saue saun saur saus sbaa sbac sbar sbas sbbs sbca sbcc sbcs sber sbsa sbse sbus scaa scab scac scan scar scas scba sccc scce sccs scea scec scee scer scna scnr scr- scra scrc scre scrn scrs scsa scsc scsn scsr scsu scua scub scun scur se-c se-e se-n se-s se-u seaa seab seac sean sear seas seau seba sebe sebs sec- seca secc sece secn secr secs secu seea seeb seec seen seer sees seeu sena sene senn senr sens sera serb serc sere sern serr sers seru sesa sesc sese sess seur snab snar snas snba snca sncc sneb snee sner snes snns snra snrs snub snur snus sras srbc srcc sreb srec sres srna srnn srub ssaa ssab ssac ssan ssas ssau ssbn ssbr ssca sscc ssce sscs ssec ssee sses ssns ssra ssrc ssrs sssa sssb sssc ssss suan suar suas sub- suba subb subs suc- succ sucr sucs suee suen suer sues sueu sun- suna sunb sune sunn suns sunu sur- sura surc sure surn surr surs suru sus- susa suse suss susu suus uabc uaca uaes uarc uars uaru uasa uaua ubac ubar ubba ubbe uber ubra ucan ucar ucas ucbc ucca ucea uces ucrc ucsa ucsb ucsc ucsu ucua ueba uers uesn uess unaa unac unan unar unas unau unbe unca uncc unce uncs uneb unec unee unen uner unes unna unne unns unra unrs uns- unsa unsc unus urac uran uras urau urba urbe urbs urca ure- urea ures urna urne urns urra urre ursa urse urss ursu urun urur urus us-a usaa usac usan usar usas usba usbc usbe usbr usbs usca uscc usce uscs usea usee usen user uses usna usnc usnr usnu usra ussa ussb ussc usse ussr usss ussu usua usun usus uuen uuuu